67530451681 has 32 divisors (see below), whose sum is σ = 88692249600. Its totient is φ = 49813807680.

The previous prime is 67530451669. The next prime is 67530451699. The reversal of 67530451681 is 18615403576.

It is a happy number.

It is not a de Polignac number, because 67530451681 - 2¹⁵ = 67530418913 is a prime.

It is a super-2 number, since 2×67530451681² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67530451981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1991890 + ... + 2025508.

It is an arithmetic number, because the mean of its divisors is an integer number (2771632800).

Almost surely, 2^67530451681 is an apocalyptic number.

It is an amenable number.

67530451681 is a deficient number, since it is larger than the sum of its proper divisors (21161797919).

67530451681 is a wasteful number, since it uses less digits than its factorization.

67530451681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35029.

The product of its (nonzero) digits is 604800, while the sum is 46.

The spelling of 67530451681 in words is "sixty-seven billion, five hundred thirty million, four hundred fifty-one thousand, six hundred eighty-one".